Line space mechanism for typewriting machines



May 31, 1932. H. A. FOOTHORAP 5 LINE SPACE MECHANISM FOR TYPEWRITINGMACHINES FiledApril Q1929 2 Sheets-Sheet 1:Hiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiil i fizz 1222 23% fir}? ifol/mirap. 7 i v auio'zwut May 31, 1932. H. A. FOOTHORAPLINE SPACE MECHANISM FOR TYPEWRITING MACHINES Filed April 4, 1929 2Sheets-Sheet 2 yk j 1/7 20 Hill Patented May 31, 1932 UNITED STATESPATENT OFFICE HARRY A. FOOTHORAP, OF HARRISBURG,

PENNSYLVANIA, ASSIGNOR TO ELLIOTT- FISHER COMPANY, OF NEW YORK, N. 'Y.,A CORPORATION OF DELAWARE LINE SPACE MECHANISM FOR TYPEII RITINGMACHINES Original application filed March 25, 1927, Serial No. 178,349.

1929. Serial My invention relates to billing machines of the type knowncommercially as the Elliott-Fisher machine, and more particularly toimprovements in line spacing mechanism for such machines.

In machines of this type the line spacing mechanism proper is mountedupon a line space shaft so that the shaft is used as a bearing forcertain rotatably mounted elements of said mechanism. This shaft is oneelement of a truck mounting for a line space frame and is rotatableindependently of operation of the line spacing mechanism when the linespace frame is moved manually in a forward or reverse direction.

It is the particular object of my invention to provide for mounting theline spacing mechanism so that all the elements thereof, including themounting, are out of contact with the line space shaft and at the sametime the rotatable parts are movable concentrically about the shaft,with the end in view of eliminating frictional resistance againstoperation of the shaft and thus providing for easier operation of thecarriage under all conditions.

Other and subordinate objects Will appear during the course of thesucceeding description.

In the accompanying drawings:

Figure 1 is a side elevation of a portion of an Elliott-Fisher machineincluding the line space frame, and embodying my invention,

Figure 2 is a front elevation of the line spacing mechanism,

Figure 3 is a sectional view through the line space spacing mechanism,

Figure 4 is a. detail perspective view of a bearing sleeve for the linespacing mechanism,

Figure 5 is a detail view of a collar,

Figure 6 is a similar view of a hub member,

Figure 7 is a detail perspective view of the dog rocker of the linespacing mechanism, and

Figure 8 is a similar view of a dog carrier.

The present application is a division of my copending application SerialNo. 178,349, filed March 25, 1927, to which attention is Divided andthis application filed April 4, No. 352,488.

directed for a more complete disclosure of such elements of anElliott-Fisher billing machine as the line space frame, its mounting,and other parts not shown in detail in the present instance.

In the drawings 1 designates a portion of one of the side rails of anElliott-Fisher billing machine which form a part of a stationary platensupporting frame and between which is mounted the usual platen, notshown. The numeral 2 designates the line space frame of the machinewhich comprises side brackets, one of which is shown at 3, and front andrear bars 4 and 5 respectively. The line space frame 2 is mounted uponthe side rails 1, for movement back and forth over the platen, by meansof front and rear rolls as at 6 and 7, respectively. As will beunderstood, a letter space carriage, indicated at 8, is suitablysupported upon the bars 4 and 5 and printing mechanism, now shown, ismounted upon the letter space carriage. For a complete disclosure ofsuch elements attention is directed to my Patent No. 1,421,201.

The rear rolls 7 are fast upon a line spacing shaft 9, having its endsjournaled in the brackets 3 of the line space frame as shown at 10. Theline spacing shaft 9 is geared to the side rails 1 by means of gears,one of which is shown at 11, fast on the shaft 9 and meshing withtoothed racks 12 on the side rail 1.

In accordance with my present invention the line spacing mechanism,designated as a unit by the numeral 13, and which in its mode ofoperation is not novel, contemplates its removal from the shaft 9 whichhas ordinarily constituted the supporting or bearing element for theline spacing elements.

Instead of mounting these movable parts on said shaft I provide a fixedbearing sleeve 14 encircling the shaft 9, but free from contacttherewith, and screwed or otherwise rigidly secured to one of thebrackets 3 as indicated at 15. On this sleeve 14 rotates a hub 16, towhich are fixed the dog rocker l7 and collar 18. Also mounted on thesleeve 14 is the dog carrier 19 on which is mounted the usual line spacedog 20 arranged to engage a knurled line space wheel 21 swaged on a hub22 which is pinned to the shaft 9 as inclicated at 23. The diameter ofthe hub 22 is reduced as at 22a to provide a shoulder 22?) adjacent tothe outer side of the line space wheel 21, and receives the hub 24 ofthe usual line space stop lever 25 which is thereby confined on the hub22 by said Wheel 21. The line space stop lever 25, as will beunderstood, is adapted to limit the rearward throw of the line space dog20 and is adjustable about the hub 22 to vary said throw of the linespace dog, all as described in my Patent No. 1,275,413. The collar 18and the dog carrier "17 are provided with lugs 26 and 27, respectively,for the connection of retracting springs such as shown at 28, and thecollar 18 is provided with an additional lug 29 for the attachment of alink 30 extending from a crank 31 at the rear of the shaft 82 providedat the front end of the frame with a hand operated line space lever 33.

The mode of operation of this mechanism is ordinary and need not bedescribed in detail, and it is thought that from the foregoing theimprovements effected by me will be clearly understood, but I reservethe right to effect such modification of the illustrated structure asmay come within the scope of the appended claims.

What I claim is:

1. The combination with a line space frame. a line space shaft, and aline space wheel fixed to the shaft, of a dog carrier lever, a dogrocker lever, and a mounting for said levers located intermediate thewheel and the frame, said mounting being free from contact with theshaft and supporting the dog carrier lever and the dog rocker lever formovement concentrically about said shaft.

2. The combination with a line space frame, a line space shaft, and aline space wheel fixed to the shaft, of a dog carrier lever, a dogrocker lever, and a mounting for said levers including a sleeve securedon the frame to encircle the shaft, said sleeve being free from contactwith the shaft and supporting said levers for movement about said shaft.

In testimony whereof I have affixed my signature.

HA'RRY A. FOOTHORAP.

